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Forums > C64 Coding > SID filter cutoff diagrams
2016-04-09 11:38
Hypnosis

Registered: Mar 2015
Posts: 36
SID filter cutoff diagrams

I'm looking for diagrams to detail how the filters in 6581 and 8580 compares to each other. I'd like to see if it is possible to support both chips.
2016-04-09 11:55
chatGPZ

Registered: Dec 2001
Posts: 11111
check alankilas page:

https://bel.fi/alankila/c64-sw/curves-8580.png
https://bel.fi/alankila/c64-sw/fc-curves/curves.png
2016-04-10 05:33
Hypnosis

Registered: Mar 2015
Posts: 36
Good stuff! Thanks a lot!
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